Characterization of fatigue crack growth behavior in LENS fabricated Ti-6Al-4V using high-energy synchrotron x-ray microtomography
Abstract
Laser Engineered Net Shaping (LENS) is an additive manufacturing technique that belongs to the ASTM standardized directed energy deposition category. To date, very limited work has been conducted towards understanding the fatigue crack growth behavior of LENS fabricated materials, which hinders the widespread adoption of this technology for high-integrity structural applications. In this study, the propagation of a 20 μm initial crack in LENS fabricated Ti-6Al-4V was captured in-situ, using high-energy synchrotron x-ray microtomography. Fatigue crack growth (FCG) data were then determined from 2D and 3D tomography reconstructions, as well as from fracture surface striation measurements using SEM. The generated data were compared to those obtained from conventional FCG tests that used compliance and direct current potential drop (DCPD) techniques to measure long and small crack growth. In conclusion, the observed agreement demonstrates that x-ray microtomography and fractographic analysis using SEM can be successfully combined to study the propagation behavior of fatigue cracks.
- Authors:
-
- General Dynamics Electric Boat, Groton, CT (United States)
- Worcester Polytechnic Institute, Worcester, MA (United States)
- Air Force Research Lab., Wright-Patterson AFB, OH (United States)
- Nutonian Inc., Somerville, MA (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Babcock Power, Worcester, MA (United States)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1394646
- Alternate Identifier(s):
- OSTI ID: 1397461
- Grant/Contract Number:
- AC02-06CH11357; DEAC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Additive Manufacturing
- Additional Journal Information:
- Journal Volume: 12; Journal Issue: PA; Journal ID: ISSN 2214-8604
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 3D characterization of fatigue crack growth; High-energy synchrotron x-ray microtomography; LENS fabricated Ti-6Al-4V
Citation Formats
Sandgren, Hayley R., Zhai, Yuwei, Lados, Diana A., Shade, Paul A., Schuren, Jay C., Groeber, Michael A., Kenesei, Peter, and Gavras, Anastasios G. Characterization of fatigue crack growth behavior in LENS fabricated Ti-6Al-4V using high-energy synchrotron x-ray microtomography. United States: N. p., 2016.
Web. doi:10.1016/j.addma.2016.09.002.
Sandgren, Hayley R., Zhai, Yuwei, Lados, Diana A., Shade, Paul A., Schuren, Jay C., Groeber, Michael A., Kenesei, Peter, & Gavras, Anastasios G. Characterization of fatigue crack growth behavior in LENS fabricated Ti-6Al-4V using high-energy synchrotron x-ray microtomography. United States. https://doi.org/10.1016/j.addma.2016.09.002
Sandgren, Hayley R., Zhai, Yuwei, Lados, Diana A., Shade, Paul A., Schuren, Jay C., Groeber, Michael A., Kenesei, Peter, and Gavras, Anastasios G. Wed .
"Characterization of fatigue crack growth behavior in LENS fabricated Ti-6Al-4V using high-energy synchrotron x-ray microtomography". United States. https://doi.org/10.1016/j.addma.2016.09.002. https://www.osti.gov/servlets/purl/1394646.
@article{osti_1394646,
title = {Characterization of fatigue crack growth behavior in LENS fabricated Ti-6Al-4V using high-energy synchrotron x-ray microtomography},
author = {Sandgren, Hayley R. and Zhai, Yuwei and Lados, Diana A. and Shade, Paul A. and Schuren, Jay C. and Groeber, Michael A. and Kenesei, Peter and Gavras, Anastasios G.},
abstractNote = {Laser Engineered Net Shaping (LENS) is an additive manufacturing technique that belongs to the ASTM standardized directed energy deposition category. To date, very limited work has been conducted towards understanding the fatigue crack growth behavior of LENS fabricated materials, which hinders the widespread adoption of this technology for high-integrity structural applications. In this study, the propagation of a 20 μm initial crack in LENS fabricated Ti-6Al-4V was captured in-situ, using high-energy synchrotron x-ray microtomography. Fatigue crack growth (FCG) data were then determined from 2D and 3D tomography reconstructions, as well as from fracture surface striation measurements using SEM. The generated data were compared to those obtained from conventional FCG tests that used compliance and direct current potential drop (DCPD) techniques to measure long and small crack growth. In conclusion, the observed agreement demonstrates that x-ray microtomography and fractographic analysis using SEM can be successfully combined to study the propagation behavior of fatigue cracks.},
doi = {10.1016/j.addma.2016.09.002},
journal = {Additive Manufacturing},
number = PA,
volume = 12,
place = {United States},
year = {Wed Sep 28 00:00:00 EDT 2016},
month = {Wed Sep 28 00:00:00 EDT 2016}
}
Web of Science
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